Noncontact Friction and Force Fluctuations between Closely Spaced Bodies

Journal Article · Mon Aug 27 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.096801· OSTI ID:40277481

Stipe, B C; Mamin, H J; Stowe, T D; Kenny, T W; Rugar, D

Noncontact friction between a Au(111) surface and an ultrasensitive gold-coated cantilever was measured as a function of tip-sample spacing, temperature, and bias voltage using observations of cantilever damping and Brownian motion. The importance of the inhomogeneous contact potential is discussed and comparison is made to measurements over dielectric surfaces. Using the fluctuation-dissipation theorem, the force fluctuations are interpreted in terms of near-surface fluctuating electric fields interacting with static surface charge.

• Sponsoring Organization: (US)
• OSTI ID: 40277481
• Journal Information: Physical Review Letters, Vol. 87, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.87.096801; Othernumber: PRLTAO000087000009096801000001; 047135PRL; PBD: 27 Aug 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DAMPING
DIELECTRIC MATERIALS
ELECTRIC FIELDS
FLUCTUATIONS
FRICTION